There’s more info on the Hololens hardware — the first fully untethered, see-through ‘holographic’ computer that will arrive with Windows 10 — in the video below:

“Windows 10 is the first platform to support holographic computing with APIs that enable gaze, gesture, voice, and environmental understanding on an untethered device. Microsoft HoloLens, together with Windows 10, will bring high‑definition holograms to life in your world”